Locomotive boiler



July 7, 1931. A. w; NELSON 1,313,074 I LOCOMOTIVE BOILER, v

Filed June 18, 1928 2 Sheets-Sheet .1

JZUC-VZZE wz 'zzv wp July 7, 1931. A. w. NELSON LOIC-OMOTVIVE BOILER Filed June 18, 1928 2 Sheets-Sheet 2 I Patented .7,

amnion lvnnsomfor RIDGE, rtmrforsgassreivoit 'ro nocomorrvn rmnnox' j oomrm, oror: I .".Aoc rtm vors "A" conromr ou on DELA ARE qwm mvn B LE f, l

' Application" filed J'une 18,

I it This inventionlrelatesi enerallymovem in loco v oi r' ndlm I particularly to a construction which is ad vantageousin that type of boiler having a 5 fi e ox; w e n e s bufned i spe s on and the invention consists ofthematters hereinafter described. and;,morefparticularly pointedoutinthe appendedclaims."

' 6 O objects'of th present 'nvention 7 1o isto provide a novel water heating and circulating arrangement which partially bottoms the firebox and includes a pair o f water tables, oneconnected to and extending down- .wardly and inwardly from each side water legato join with a common-headerethat isiin turn connected .tothefrontf throat of! the boilei-., Another object of theinvention :is

to sq ;.form" the elements that the air neces' sary to support combustion in v suspension 1s goadmitted through partsof each element and preferably one oneach side of the header common to both. elements.

"Still another obj ect of the inventioneis to.

provide a structure; of this kind, which with only a minor change, is adaptedto employ eithera single or double fuel nozzle so that conditions in differentsizes of fireboxes may be readily accommodated.

These objects of the invention well as o o he og he wit h aad ai ages thereof, w ll more fully appear. asfl' proceed it 'my speci ce om InQthje drawings IFig. is a longitudinal vertical sectional" 86 .view through the firebox endf ofa locomotive boiler embodying one form or myrinvention. Fig. 2 is a horizontal sectional View through the, sal ne as takenon the, line 2-'2, of Fig. 1', with-the firebrick, burner and, associated parts omitted to betterdisclose'sthe construction and arrangement of the water sear'nin and circulating elements 6 and associate:

gheader. Fig. 3 1s a transverse verticalsectional v ew 46 through the firebox end oftheboiler astaken' .on the line 3 3 ofjFig; 1. .1,

Fig.4is a View on anenlar'g ed scale, simg I v p is staybolted; as at22fthroughout its length tqqamply re ist internal pressures andfthe ex rem ron l h fis ui e s v i ilar to-the bottom portion ofFig. andlsh'ows ing a modified form of construction' 192s. Seria1-'ITo. 286,441.;- Q

to inclusivejof the accompanying drawe in s -sl" di ates n -M1 9 6 e barrel of h and crown; sheet .6 all connected together in mail; ,ol inseam. instea in Fi s. i

the ha 'n r l kn wn T eb mTPQr tion; 3% of the -fiue sheet lformsthe throat sheet oftheflirebox 3 i plate7, the s'ide plates 8%8, the outside throat plateQandthewoutsideback plate 10. {The v compr ses the top wrapper. just described, together with the firebox sheets before mentioned, define the I several. water legs of the'boiler, i. e., the side legs-lll theiront leg'o'r throat11 2, and back leg l3 all closed at the bottom by theusual mud' ri ng lt. i Thefir'ebox sheets are joined to the wrapper plates by means of staybolts- 1 5111 themanner wellknown. 16 indicatesa i dooropen-ing closed by'a. Q I door-(not shown) This opening provides 'thefueldOOr opening in casefthe firebox j conyerted 'into a o'oa1' burner. as isfsometimes necessary and which conversion may be read '..l, y made, ,with but comparatively smalleX box: I I provide :a novel water steaming and circulating. means indicated asa whole by the middlijbidamip r b h enumeral 17, in Fig. 2. Said means comprises eictend downwardly and inwardly therefrom,

connected to front throat .she'et; 3*". Prefer- .a'pair of laterally spacedfiathollow elements ,I l8":18iwhich are each connected at one end V to an associated side sheet. of the firebox, and S5 l to terminates in longitudinally spaced I branchesl 'llg The branches of each ele- .;ment 'are connected "to opposite sides, ofa header 20, disposed in a the longitudinal median plane of the firebox, This headerwhich isclosed at its rear end, e xtends beyond said, u elements at its front end, where it is curved .upvvardly warmth intakeneck 21 that'is' 95 ably saidheader. which 'iswof,an..elliptioal cross section of subtantially la ge diameter mamin a flexible diaphragm 23 in the throat sheet 3". This diaphragm is positioned a suitable distance above the mud ring so as to make conversion from one type of firebox to the other, practical.

The arrangement described occupies a substantial area in the bottom of the firebox and the branches of each element together with those portions of the header between said branches provide air inlet openings 2424 necessary to support proper combustion.

As before stated, the elements are al" ranged in the mid-portion of the firebox so that the front and rear ends thereof are spaced from the like ends of the firebox. The space to the front of said elements is closed b a front or burner wall 25 and the space to t e rear of said elements is closed by a rear 01' flash wall 25 both walls being made of firebrick. In the front or burner wall there is located, one on each side of the intake neck of the header, fuel nozzles 2626 which are directed inwardly and downwardly toward the midportion of the firebox. Said nozzles as shown herein are of the oil burner type and project through suitable o nings 27 in said walls as best indicated in ig. 1.

The elements l818 are provided at those ends which are connected to the side sheets 55 with top, bottom and end flanges 28 which fit in openings in said side sheets and are butt welded thereto as at 29 and certain of the stay bolts 15 employed between the side sheets and associated side plates 8, connect said flanges to said side plates as best shown in Fig. 3. So that said elements may amply withstand the internal pressures generated in use for their intended purpose I staybolt said elements as indicated at 30.

In Fig. 4 I have illustrated a. slightly modified form of construction wherein the intake end 21 of the header 20 is formed for connection with two different points in the throat sheet 3. As shown said intake end hastwo diverging tubular branches 2121 respectively, each fixed at its extremity in diahragms 2323 in said throat sheet.

nder such conditions only a single burner nozzle 26 is em loyed and said nozzle is positioned in the urner wall 25" midway be tween said branches 2l -21. To assist in supporting the header and elements, I provi e one or more stra s 3 1 which are fixed at their ends to the si e portions of the mud ring 14 and each has a central seat in which the header engages.

In operation, the intense heat from the fuel burning in suspension, over the said elements and header, causes a rapid absorption of heat by the upper sides thereof, which in turn passes to and is absorbed by the water in said elements and header, thus converting part of it into steam. Because of the inclined positions of the elements, a rapid flow of water into the side water legs of the boiler is produced. That is to say water flows from the throat of the boiler into the header and then through the branches 19-19 into the elements 18-18 and from there into said side water legs. Thus the header and elements provide a relatively large superficial area which is exposed to the radiant heat of the fuel burning in suspension in the firebox.

The structures described are confined to firebox dimensions so that they do not interfere with the numerous other parts of the locomotive and they are so disposed in the firebox that they are not subjected to such widely different temperature changes as would cause them to be affected by the re sulting strains and stresses.

The arrangement of said parts is such that they may be readily removed from the the box when necessary so that the firebox may be changed to a coal burner with a minimum amount of labor.

While in describing my invention, I have referred in detail to the construction, form and arrangement of the parts thereof I do not wish to be limited thereto except as may be specifically pointed out in the appended claims.

I claim as my invention 1. A locomotive boiler construction em bodying therein a firebox having side sheets i YOU each element at longitudinally spaced points thereof and providing air inlet openings for the firebox between said points of connection, said elements and header coacting to substantially close the bottom of the firebox.

2. A locomotive boiler construction embodying therein a firebox having side sheets =15 and a throat sheet, a pair of relatively flat hollow Water circulating and steaming elements each affixed at their outer ends to and opening through an associated side sheet and extending downwardly and inwardly to terminate in longitudinally spaced branches, and a header coacting with said elements to substantiall close the bottom of the firebox, said header being connected at one end to said throat and positioned at its other end between the branches of each element and whichare connected to said end of the header, portions of said header and portions of said elements between said branches, providing air inlet openings for the firebox.

3. A locomotive boiler construction embodyin therein a firebox havingside sheets and a t roat sheet, a pair of relatively flat hollow water circulating and steaming ele ments, each being afiixed at the. top end to .and opening through an assoeiated' side sheet and extending downwardly and inwardly therefrom and a header positioned at one end between and connected to the'bottom inner ends of said elementsand having diverging branches at its: other end openin'g'throughr and connected. to said throat sheet, saidele- 1 ments and header coactin tosubstantially close the bottom ofthe fire ox. In testimony whereof, I have my hand, this 31st day of May, 1928. I ARTHUR WM. NELSON.

hereunto set v 

